Hybrid hydrocyclone process operating with natural water

Puprasert, Chaiyaporn; Siangsanung, Vorasiri; Guigui, Christelle; Levecq, C.; Hébrard, Gilles

doi:10.1016/j.cep.2012.07.001

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…Rosa used flocculation and flotation processes to produce aerated polymeric flocs of emulsified oil dispersions, which were then separated in centrifugal cells [31]. Puprasert used the micro-bubbles to separate aerated flocs formed by coagulation and flocculation in the hydrocyclone [32]. However, they do not have a compact system that combines coagulation, flocculation and separation at the same time.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cone-Plate Clarifier Structure Parameters on Flocculation Efficiency

Liu¹,

Xiao²,

Chang³

et al. 2021

Separations

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In this study, a coal mine water flocculation system was established. A series of flocculation tests were carried out at different structural parameters (cylinder height, cone-plate insertion depth and cone-plate spacing) to better investigate the effect of the cone-plate clarifier on coal mine water treatment performance. Sixteen sampling points were set up in the system for data monitoring to generate the required data. The cone-plate clarifier was divided into five zones for flocculation analysis. The increased cylinder height facilitated the flocculation of particles in the micro flocculation zone and the settling of particles in the settlement zone. The chemicals used are polyaluminum chloride (PACl), Fe3O4 and polyacrylamide (PAM), corresponding to doses of 60 mg/L, 40 mg/L and 6 mg/L, respectively. Insufficient insertion depth of the cone-plate will cause the small flocs that have not been fully flocculated to enter the exit pipe zone directly through the cone-plate, while too much insertion depth will cause the large floc in the settlement zone to re-enter the exit pipe zone. The flocculation effect of small flocs increased as the cone-plate spacing decreased, which is consistent with the shallow pool theory. When the cone plate spacing was too narrow, the amount of fluid was reduced and the increase in fluid velocity reduced the flocculation effect. Curve fitting was conducted for Suspended solids(SS) and turbidity removal efficiency under each structural parameter to derive the variation of SS and turbidity removal efficiency under different structural parameters. The regression models of SS and turbidity removal efficiency on the cylinder height, cone-plate insertion depth and cone-plate spacing were established based on the curve fitting results, and the regression models were verified to be well fitted based on the comparison of experimental results. Finally, the optimal values of SS and turbidity removal efficiency were found based on the regression model. The flow rate of the cone-plate clarifier is 0.6 m3/h. The SS removal efficiency reached 96.82% when the cylinder height was 708 mm, the cone-plate insertion depth was 367 mm and the cone-plate spacing was 26 mm. The turbidity removal efficiency reached 86.75% when the cylinder height was 709 mm, the cone-plate insertion depth was 369 mm and the cone-plate spacing was 26 mm.

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Section: Introductionmentioning

confidence: 99%

Effect of Cone-Plate Clarifier Structure Parameters on Flocculation Efficiency

Liu¹,

Xiao²,

Chang³

et al. 2021

Separations

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show abstract

“…Rubio and Rosa 18 used a flocculation and flotation process to produce aerated polymeric flocs of an emulsified oil dispersion followed by separation in a centrifuge cell. Bamrungsri et al 19 and Puprasert et al 20 presented a hybrid process combining coagulation, flocculation, and hydrocycloning. The results have shown that the centrifugal forces created by the tangential flow injection lead to strong velocity gradients at the wall, which promote the coagulation and flocculation phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation and experimental study on a cone-plate clarifier

Yang

Liu

Zhang

et al. 2019

Advances in Mechanical Engineering

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The large amount of fine and light particles in the mine water are difficult to be removed using the traditional separator. In order to improve the separation efficiency, this article presents a new type of compact cone-plate clarifier with which a hybrid process combining magnetic flocculation separation with hydrocycloning can be achieved for sewage treatment. Addition of cone-plates to the elongated vortex finder provides more possibility for small magnetic flocs to aggregate and form into large flocs as well as increase the sedimentation area. The numerical simulation indicates that the coneplate is conducive to the agglomeration of small particles in the cylindrical body and favorable for flocs to precipitate steadily in the conical part of the clarifier. Further comparative experiment verifies the effectiveness of the cone-plates. Then, the influence of cylinder height, insertion depth, and spacing of cone-plates on the water quality of the clarifier have been researched, and the optimum structural parameters have been determined. With the optimum parametersa cylinder height of 600 mm, a cone-plate insertion depth of 400 mm, and plate spacing of 20 mm, a property index of 93.71% for suspended solids removal and 70.17% for turbidity decrease has been obtained for the mine water treatment.

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